Water-trap for waste-pipes.



No. 736,688. PATENTED AUG. 18, 1903. P. B. GHARROIN; WATER TRAP FOR WASTE PIPES.

H0 MODEL.

UNITED STATES Patented August 18, 1903.

ATENT OFFICE.

WATER-TRAP FOR WASTE-PIPES.

SPECIFICATION forming part of Letters Patent No. 736,688, dated August 18, 1903.

Application filed December 23, 1901. $erial No. 86,963. (No model.)

To aZZ whom it may concern:

Be it known that I, FRANK BRYAN CHAR- ROIN, a citizen of the United States, residing at Fairhaven, in the county of Whatcom and State of Washington, have-invented a new and useful Water-Trap for Waste-Pipes, of which the following is a specification.

My invention is an improved water-trap for waste-pipes and other connections, the object of my invention being to provide a water-trap with means to prevent siphonic action therein and the breaking of the water seal; and my invention consists in the peculiar construction and combination of devices hereinafter fully set forth and claimed.

The accompanying drawing is a vertical sectional view of a water-trap embodying my improvements.

The seal-chamberl of my improved watertrap has the intake-leg 2 and the dischargeleg 3. The trap is of such construction that a Water seal is normally maintained in the seal-chamber between theinlet and discharge legs to prevent the passage of sewer-gas through the trap.

An air-passage 4. is formed with the trap and connects the lower end of the intake-leg with the upper end of the discharge-leg, the latter having at its upper end a gooseneck connection 5 with the upper end of said airpassage, and in the event of siphonic action being induced in the trap the said air-passage as soon as the lower end thereof is uncovered by the lowering of the water-level in the intake side of. the trap operates to break the siphon and prevent the emptyingof the water from the sealchamber.

The discharge side of the trap consists of the water-passage, which is circumferentially enlarged or bulged intermediate of its ends, thus to cause it to be of greater capacity than the intake side thereof, as is indicated at a in the drawing. Hence at the beginning of siphonic action in the trap enough of the water from the seal-chamber is retained in the enlarged discharge side'of the trap to reestablish the water seal and submerge the lower end of the air-passage 4. after the latter has operated to discontinue the siphonic action.

The normal water-level in the seal-chamber of the trap is indicated in the drawing by the line b b. The level at which the air-passage becomes eflicient to prevent siphonic action in the trap is indicated in the intake leg or side thereof by the line 0 c. It will be understood that the level in the discharge side or leg of the trap will be correspondingly raised to the point indicated by the line (1' d and that owing to the greater capacity of the discharge side of the trap the same will retain a sufficient quantity of water to reestablish an effective water seal and submerge the lower intake end of the air-passage 4.

It will be observed by reference to the drawing that the lower intake end of the air-passage communicates with one side of the intake-leg of the trap, and hence does not obstruct the same. The upper discharge end of the air-passage communicates with the discharge-leg of the trap at an elevated point, and hence water is prevented from passing through the said air-passage.

Having thus described my invention, I claim A water-trap comprising an inlet-leg opening into an expanded seal-chamber, an airpassage disposed at an angle to said inlet-leg, converging with the lower end thereof at one edge and having its opposite edge extended downwardly to form one of the walls of said seal-chamber, the opposite wall of the latter being formed by a downward-curved extension of the outer side of the inlet-leg, an out let disposed parallel to the inlet-leg and having a gooseneck connection with the air-passage at its upper end and a water-passage connected at its upper end with said outlet-leg below the gooseneck connection and at its lower end with the seal-chamber, said waterpassage being peripherally swelled to increase its capacity above its point of connection with the seal-chamber.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

FRANK BRYAN CHAR-ROIN.

Witnesses:

B. WILLGARD, R. O. CRAFT. 

